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Shield Tech Security > Cellular & Internet Adapters > VOIP Broadband Adapter - (Phone Line to Internet for Alarm System)
Analog telephone adapter - Wikipedia
What Is a VoIP Adapter and How Do They Work | 8x8 | 8x8
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Grandstream HT802 2-Port Analog Telephone Adapter
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Amazon.com: OBi202 VoIP Phone Adapter with Router, 2-Phone Ports, T.38 Fax (Unlocked) : Everything Else
Grandstream HT801 Analog Telephone Adapter Gateway (ATA) with 1 FXS Po — WE LOVE TEC
